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AIIMS Biology Mock Test - 8 - NEET MCQ


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30 Questions MCQ Test AIIMS Mock Tests & Previous Year Question Papers - AIIMS Biology Mock Test - 8

AIIMS Biology Mock Test - 8 for NEET 2024 is part of AIIMS Mock Tests & Previous Year Question Papers preparation. The AIIMS Biology Mock Test - 8 questions and answers have been prepared according to the NEET exam syllabus.The AIIMS Biology Mock Test - 8 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for AIIMS Biology Mock Test - 8 below.
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AIIMS Biology Mock Test - 8 - Question 1

Which one is a tracheate group

AIIMS Biology Mock Test - 8 - Question 2

Adjacent epithelial cells are held together by a mass of

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AIIMS Biology Mock Test - 8 - Question 3

Feet of king fisher are modified for

AIIMS Biology Mock Test - 8 - Question 4

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): The ovary forms fruits after fertilization.
Reason (R): The ovary forms parthenocarpic fruits without fertilization.

AIIMS Biology Mock Test - 8 - Question 5

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Samara is a winged achenial fruit.
Reason (R): Wings may or may not develop from its pericarp.

AIIMS Biology Mock Test - 8 - Question 6

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Secreting hypotonic urine is effective in reducing urinary loss of water.
Reason(R): Hypotonic urine is more concentrated and higher in osmotic pressure than the blood.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 6

When there is a threat of excessive water loss from the body of the animal then the urine excreted needs to be hypertonic and not hypotonic because excessive water loss from the body possess the threat of a rise in osmoconcentration of blood. Since hypertonic urine is more concentrated and higher in osmotic pressure than the blood, therefore it helps in reducing the loss of water with urine.
Human urine is hypertonic which is more concentrated than the blood.So an isotonic glomeruler filterate is first filtered into the Bowman's capsules of nephrons in kidneys. The tubules of nephrons then reabsorb a large volume of water from the glomerular filtrate not accompained by the reabsorption of proportionate amounts of solutes. This leaves the urine more concentrated than the blood which is very effective in reducing the urinary loss of water.

AIIMS Biology Mock Test - 8 - Question 7

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Dark period play more important part in flowering than light period.
Reason (R): Flowering occurs in short-day plant if the dark period is interrupted by light break.

AIIMS Biology Mock Test - 8 - Question 8

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): A single strand of m-RNA is capable of forming a number of different polypeptide chains.
Reason(R): Termination codons occur in m-RNA.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 8

Messenger RNA (mRNA) is a molecule of RNA encoding a chemical "blueprint" for a protein product. mRNA brings instructions from the DNA for the formation of particular type of polypeptide. The instructions are present in the base sequence of its nucleotides. mRNA has methylated region at the 5'terminus. It functions as a cap for attachment with ribosome. Cap is followed by an initiation codon (AUG) either immediately or after a small noncoding region. An mRNA may specify only a singled monocistronic while the latter is known as polycistronic.
Three of the 64 codons are UAG (amber), UAA (ochre) and UGA (opal or umber), they bring about termination of polypeptide chain synthesis and are called termination codons or stop codons.

AIIMS Biology Mock Test - 8 - Question 9

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Cholorophyll a absorbs 703 nm, 683 nm and 673 nm.
Reason (R): PS I stops if chlorophyll a absorbs only 683 nm wavelength of light.

AIIMS Biology Mock Test - 8 - Question 10

In the following questions, a statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the statements carefully and mark the answer-
Assertion (A): Pinosomes and phagosomes are endocytic vesicles.
Reason (R): They are modification of cell membrane.

AIIMS Biology Mock Test - 8 - Question 11

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Transport of minerals occurs only in the phloem.
Reason (R): The minerals are first transported to leaves.

AIIMS Biology Mock Test - 8 - Question 12

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): In caducous plants, leaves are never formed.
Reason (R): In deciduous plants, all leaves fall together.

AIIMS Biology Mock Test - 8 - Question 13

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Cytochromes are a group of a copper-containing electron transferring proteins.
Reason (R): The terminal cytochrome reacts with oxygen.

AIIMS Biology Mock Test - 8 - Question 14

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Plants possessing C4- pathway of carbon fixation have a higher net primary productivity than the C3-pathway possessing plants.
Reason(R): For each unit weight of fixed carbon, C4- pathway possessing plants require less water than the C3-pathway possessing plants.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 14

C3 plants exclusively fix CO2 via the Calvin Benson pathway. The leaf cells of C4 plants possess two types of chloroplast, bundle sheath cells and mesophyll cells. The mesophyll cells of C4 plants mesophyll cells. The mesophyll cells of C4 plants carboxylase, which catalyses the fixation of CO2 with PEP to form oxaloacetic acid. The bundle sheath cells exhibit high RuBP carboxylase and the other enzymes of the Calvin-Benson cycle. C4 plants are highly productive photosynthetically in view of the low affinity of RuBP carboxylase for its substrate. But CO2 is concentrated as C4 acids due to the activity of the PEP carboxylase, which in effect maintains high pool levels of CO2. C4 plants are related to very high light-harvesting saturation points. C4 plants exhibit low rates of photorespiration only in bundle sheath cells. C4 plants are adapted to high temperature. C4 plants show better utilization of available water but it cannot be the cause of its higher productivity.

AIIMS Biology Mock Test - 8 - Question 15

Transfer of genetic material in bacteria through virus is termed as 

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 15

Transduction is the process by which a virus transfers genetic material from one bacterium to another. Viruses called bacteriophages are able to infect bacterial cells and use them as hosts to make more viruses.

AIIMS Biology Mock Test - 8 - Question 16

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): In bacteria, photosynthesis occurs by utilizing wavelengths longer than 700 nm.
Reason(R): Here the reaction centre is P-890.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 16

Bacterial photosynthesis occurs by utilizing wavelengths longer than 700 nm. Here, the reaction centre is P-890 and the reductant is NADH + H+. In bacteria, the donar is hydrogen sulphide or malate or succinate instead of water.

AIIMS Biology Mock Test - 8 - Question 17

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Diabetes insipidus is marked by excessive urination and too much thirst of water.
Reason(R): Anti-diuretic hormone (ADH) is secreted by the posterior lobe of pituitary gland.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 17

Anti-diuretic hormone (ADH) or vasopressin is a peptide hormone, synthesized in the hypothalamus and released by the posterior pituitary gland, that stimulates capillary muscles and reduces the flow of urine and increases its concentration. It is released in response to a fall in the water content of blood plasma and lead to an increase in the permeability to water of the distal and collecting tubules of the nephron. Deficiency or hyposecretion of ADH results in diabetes insipidus.
Diabetes insipidus is characterized by micturating dilute urine several times a dday which results in excessive thirst and dehydration.

AIIMS Biology Mock Test - 8 - Question 18

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): The age-sex structure of human population in countries like France and Germany gives a steep pyramid.
Reason(R): In countries like Sudan and India the population is increaseing at a rapid rate.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 18

The most important demographic characteristic of a population is its age sex structure which is also known as population pyramids. Age sex pyramids display the percentage or actual amount of a population broken down by gender and age. Developed countries with stable population gives a steep pyramid.
The population of Sudan and India are increasing at a rapid rate. The population growth rate for Sudan is 2.60% and for India it is 1.40%.

AIIMS Biology Mock Test - 8 - Question 19

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Corm is a highly condensed and specialised underground stem.
Reason (R): Corm has circular nodes.

AIIMS Biology Mock Test - 8 - Question 20

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): A cholera patient is given glucose, electrolytes and water.
Reason(R): These plasmolyse the disease causing germs.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 20

Cholera is an acute infectious disease which is caused by Vibrio cholerae. The stools and the vomit of a cholera patient are full of cholera germs and these may get into a healthy person when contaminated food or drink is taken by mouth.The most important is to give glucose electrolytes and water to replace the lost fluid and salts through stools and vomit.

AIIMS Biology Mock Test - 8 - Question 21

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Wounds heal slowly due to vitamin C deficiency:
Reason(R): Vitamin C is essential for collagen formation.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 21

Main function of Vitamin C is to speed up the healing of wounds . So deficiency of Vitamin C causes the slow healing of wounds. The best characterized function of Vitamin C is the synthesis of collagen connective tissue protein at the level of hydroylation of prolyl and lysyl residues of procollagen. Thus Vitamin C is important for tissue healing.

AIIMS Biology Mock Test - 8 - Question 22

In food, starch is detected by its

AIIMS Biology Mock Test - 8 - Question 23

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Axillary buds, in actively growing herbaceous plants generally remain dormant.
Reason(R): This is due to apical dominance which is under the influence of auxins.

Detailed Solution for AIIMS Biology Mock Test - 8 - Question 23

The axillary bud is a bud that develops in the axil of a leaf of a plant (synonymous with lateral bud).Apical dominance is the phenomenon whereby the main central stem of the plant is dominant over (i.e., grows more strongly than) other side stems; on a branch the main stem of the branch is further dominant over its own side branchlets.When the apical bud is removed the axillary buds sprout.

AIIMS Biology Mock Test - 8 - Question 24

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Seeds produced by a large number of plants do not germinate immediately.
Reason (R): Some seeds undergo germination after ripening process.

AIIMS Biology Mock Test - 8 - Question 25

In man, blood passes from the post caval into the diastolic right atrium of the heart because of

AIIMS Biology Mock Test - 8 - Question 26

End product of glycolysis is

AIIMS Biology Mock Test - 8 - Question 27

Castel's intrinsic factor is connected with internal absorption of

AIIMS Biology Mock Test - 8 - Question 28

The hereditary material(DNA) present in the bacterium E.coli is :

AIIMS Biology Mock Test - 8 - Question 29

Of the following plants which one would you consider an endangered plant due to over exploitation?

AIIMS Biology Mock Test - 8 - Question 30

Castor oil is obtained from

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